From research it appears to be Shurhit Model TE-20. Flexible Drive Compression Tester.
Vintage Shurhit Model TE-20 Flexible Drive Compression Tester - Untested
Vintage Heathkit Model CO-1015 Ignition Analyzer FOR PARTS OR REPAIR
Vintage Knight Model KG-375 Universal Auto Analyzer with Leads Tested and Works
Vintage Thor Model 555A Attach 3/8" air ratchet Production Ratchet GM???
Vintage Sun Model 45 Power Timing Light For Parts/Repair 6V 12V Service Station
Vintage Knight Model KG-375 Universal Auto Analyzer with Leads
